What´s the probability
What is the probability of flipping a ¨heads¨on a coin?
1/2
explain the difference between a population and a sample.
Answers may vary.
a six sided dice is rolled 18 times. How many times would you expect to roll a 3?
3
6!
720
A coin is flipped 20 times. The results are as follows:
heads:14
What is the experimental probability of flipping a tails?
6/20 or 3/10
What is a random sample?
Each person in a population has an equal chance of being selected in the sample.
50 students in the american school voted for their favorite snack. The results are as follows:
cookies: 12
Brownies: 8
total: 20
How many students would you expect to choose cookies as their favorite snack if there are 100 students?
60 students
10P2
90
A candy manufacturing company makes bon bon bums. Every 200 hundred bon bon bums they make, there are 16 that are broken. What is the experimental probability that a bon bon bum pulled at random is not broken?
184/200 ... 92/100 .... 46/50... 23/25
What is a biased question and give an example.
A biased question is a question that favors one answer over another. Examples may vary.
7P4
840
Is it biased:
The teachers at the American school are running for president. Who would you vote for? Mr. Benjamin, Ms. Lauren, Ms. Maria Isabella, or the head of the math department, Mr. Frank?
Biased.
Vote for me. :)
There are ten pencils. three are green, four are yellow, and three are blue. Ms. Caroline pulls one pencil and does not replace it. What is the probability that she pulls a blue pencil and then a green pencil?
9/90 or 1/9
10C3
120
What is the difference between a combination and a permutation? and what is the formula for a combination?
In a combination, the order does not matter.
There are ten pencils. three are green, four are yellow, and three are blue. Ms. Caroline pulls one pencil and does not replace it. What is the probability that she pulls two blue pencils in a row
6/90 or 1/15
9C4
126